Solving the chocolate challenge

This challenge is about chocolate. You have to imagine (if necessary!) that everyone involved in this challenge enjoys chocolate and wants to have as much as possible.

There are 3 tables.

Table 1 has one block of chocolate.

Table 2 has two blocks of chocolate.

Table 3 has three blocks of chocolate.

Now ... outside the room is a class of children. Thirty of them all lined up ready to go in and eat the chocolate. These children are allowed to come in one at a time and can enter when the person in front of them has sat down. When a child enters the room they ask themself this question:

"If the chocolate on the table I sit at is to be shared out equally when I sit down, which would be the best table to sit at?"

How much chocolate would each child get as they arrive at the tables?